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authorjao <jao@gnu.org>2018-11-26 00:49:33 +0000
committerjao <jao@gnu.org>2018-11-26 00:49:33 +0000
commitc2a125cefb0bf41140db398248a5b8523b46a42e (patch)
treeb45b9e604aa581cfb368ccea4025e07ed31ebca8 /app/Configuration.hs
parent24c84e47177b6ebbe3df99db53220def6c0951ec (diff)
downloadxmobar-c2a125cefb0bf41140db398248a5b8523b46a42e.tar.gz
xmobar-c2a125cefb0bf41140db398248a5b8523b46a42e.tar.bz2
Xmobar.Config.Parse
Diffstat (limited to 'app/Configuration.hs')
-rw-r--r--app/Configuration.hs156
1 files changed, 5 insertions, 151 deletions
diff --git a/app/Configuration.hs b/app/Configuration.hs
index 6f6a0db..340124a 100644
--- a/app/Configuration.hs
+++ b/app/Configuration.hs
@@ -19,9 +19,6 @@
module Configuration (readConfig, readDefaultConfig) where
-import Text.ParserCombinators.Parsec
-import Text.ParserCombinators.Parsec.Number (int)
-import Text.ParserCombinators.Parsec.Perm ((<|?>), (<$?>), permute)
import Control.Monad.IO.Class (liftIO)
import System.Environment
@@ -29,158 +26,15 @@ import System.Posix.Files (fileExist)
import qualified Xmobar as X
-#if defined XFT || defined UTF8
-import qualified System.IO as S (readFile,hGetLine)
-#endif
-
-readFileSafe :: FilePath -> IO String
-#if defined XFT || defined UTF8
-readFileSafe = S.readFile
-#else
-readFileSafe = readFile
-#endif
-
-stripComments :: String -> String
-stripComments =
- unlines . map (drop 5 . strip False . (replicate 5 ' '++)) . lines
- where strip m ('-':'-':xs) = if m then "--" ++ strip m xs else ""
- strip m ('"':xs) = '"': strip (not m) xs
- strip m (x:xs) = x : strip m xs
- strip _ [] = []
-
--- | Parse the config, logging a list of fields that were missing and replaced
--- by the default definition.
-parseConfig :: String -> Either ParseError (X.Config,[String])
-parseConfig = runParser parseConf fields "Config" . stripComments
- where
- parseConf = do
- many space
- sepEndSpc ["Config","{"]
- x <- perms
- eof
- s <- getState
- return (x,s)
-
- perms = permute $ X.Config
- <$?> pFont <|?> pFontList <|?> pWmClass <|?> pWmName
- <|?> pBgColor <|?> pFgColor
- <|?> pPosition <|?> pTextOffset <|?> pTextOffsets
- <|?> pIconOffset <|?> pBorder
- <|?> pBdColor <|?> pBdWidth <|?> pAlpha <|?> pHideOnStart
- <|?> pAllDesktops <|?> pOverrideRedirect <|?> pPickBroadest
- <|?> pLowerOnStart <|?> pPersistent <|?> pIconRoot
- <|?> pCommands <|?> pSepChar <|?> pAlignSep <|?> pTemplate
-
-
- fields = [ "font", "additionalFonts","bgColor", "fgColor"
- , "wmClass", "wmName", "sepChar"
- , "alignSep" , "border", "borderColor" ,"template"
- , "position" , "textOffset", "textOffsets", "iconOffset"
- , "allDesktops", "overrideRedirect", "pickBroadest"
- , "hideOnStart", "lowerOnStart", "persistent", "iconRoot"
- , "alpha", "commands"
- ]
-
- pFont = strField X.font "font"
- pFontList = strListField X.additionalFonts "additionalFonts"
- pWmClass = strField X.wmClass "wmClass"
- pWmName = strField X.wmName "wmName"
- pBgColor = strField X.bgColor "bgColor"
- pFgColor = strField X.fgColor "fgColor"
- pBdColor = strField X.borderColor "borderColor"
- pSepChar = strField X.sepChar "sepChar"
- pAlignSep = strField X.alignSep "alignSep"
- pTemplate = strField X.template "template"
-
- pTextOffset = readField X.textOffset "textOffset"
- pTextOffsets = readIntList X.textOffsets "textOffsets"
- pIconOffset = readField X.iconOffset "iconOffset"
- pPosition = readField X.position "position"
- pHideOnStart = readField X.hideOnStart "hideOnStart"
- pLowerOnStart = readField X.lowerOnStart "lowerOnStart"
- pPersistent = readField X.persistent "persistent"
- pBorder = readField X.border "border"
- pBdWidth = readField X.borderWidth "borderWidth"
- pAllDesktops = readField X.allDesktops "allDesktops"
- pOverrideRedirect = readField X.overrideRedirect "overrideRedirect"
- pPickBroadest = readField X.pickBroadest "pickBroadest"
- pIconRoot = readField X.iconRoot "iconRoot"
- pAlpha = readField X.alpha "alpha"
-
- pCommands = field X.commands "commands" readCommands
-
- staticPos = do string "Static"
- wrapSkip (string "{")
- p <- many (noneOf "}")
- wrapSkip (string "}")
- string ","
- return ("Static {" ++ p ++ "}")
- tillFieldEnd = staticPos <|> many (noneOf ",}\n\r")
-
- commandsEnd = wrapSkip (string "]") >> (string "}" <|> notNextRun)
- notNextRun = do {string ","
- ; notFollowedBy $ wrapSkip $ string "Run"
- ; return ","
- }
- readCommands = manyTill anyChar (try commandsEnd) >>=
- read' commandsErr . flip (++) "]"
- strField e n = field e n strMulti
-
- strMulti = scan '"'
- where
- scan lead = do
- spaces
- char lead
- s <- manyTill anyChar (rowCont <|> unescQuote)
- (char '"' >> return s) <|> fmap (s ++) (scan '\\')
- rowCont = try $ char '\\' >> string "\n"
- unescQuote = lookAhead (noneOf "\\") >> lookAhead (string "\"")
-
- strListField e n = field e n strList
- strList = do
- spaces
- char '['
- list <- sepBy (strMulti >>= \x -> spaces >> return x) (char ',')
- spaces
- char ']'
- return list
-
- wrapSkip x = many space >> x >>= \r -> many space >> return r
- sepEndSpc = mapM_ (wrapSkip . try . string)
- fieldEnd = many $ space <|> oneOf ",}"
- field e n c = (,) (e X.defaultConfig) $
- updateState (filter (/= n)) >> sepEndSpc [n,"="] >>
- wrapSkip c >>= \r -> fieldEnd >> return r
- readField a n = field a n $ tillFieldEnd >>= read' n
-
- readIntList d n = field d n intList
- intList = do
- spaces
- char '['
- list <- sepBy (spaces >> int >>= \x-> spaces >> return x) (char ',')
- spaces
- char ']'
- return list
-
- read' d s = case reads s of
- [(x, _)] -> return x
- _ -> fail $ "error reading the " ++ d ++ " field: " ++ s
-
-commandsErr :: String
-commandsErr = "commands: this usually means that a command could not" ++
- "\nbe parsed." ++
- "\nThe error could be located at the begining of the command" ++
- "\nwhich follows the offending one."
-
-- | Reads the configuration files or quits with an error
readConfig :: FilePath -> String -> IO (X.Config,[String])
readConfig f usage = do
+ let err m = error $ f ++ ": " ++ m ++ "\n" ++ usage
file <- liftIO $ fileExist f
- s <- liftIO $ if file then readFileSafe f else error $
- f ++ ": file not found!\n" ++ usage
- either (\err -> error $ f ++
- ": configuration file contains errors at:\n" ++ show err)
- return $ parseConfig s
+ r <- if file then X.readConfig X.defaultConfig f else err "file not found"
+ case r of
+ Left e -> err (show e)
+ Right res -> return res
-- | Read default configuration file or load the default config
readDefaultConfig :: String -> IO (X.Config,[String])